Provide an answer outlining your team-playing and dispute resolution skills.
"I would suggest to my colleagues that we meet so as to present to each other evidence of the material costs for each of us. I would sit down with all parties involved and respectfully listen to what my other team members have to say in that regard. I would then provide my own evidence related to the material costs so that we can efficiently resolve this dispute while we are all face-to-face. It is better to discuss in person than via emails to minimize any miscommunication and quickly resolve all issues so as to move on to the next project."